The final home run hit at Yankee Stadium may not rank up there in Bomber lore with Roger Maris’ 61st in ’61 or Chris Chambliss’ pennant clincher in 1976, but it might just put Steve Harshman’s kids through college.

The $9 baseball could net the Wyoming football coach and state representative several hundred thousand dollars when it is sold at auction with other Yankee memorabilia at Madison Square Garden on Oct. 18.

“Those memories will last a lifetime and my son’s lifetime, but except for my 12 refrigerator magnets I’m not much of a collector,” Harshman, 45, told The Post. “I’m not sure how much it’s worth, but my wife and I are both teachers and we have four kids.”

The ball might have been worth more had it been hit by Derek Jeter or Alex Rodriguez instead of José Molina, said Arlen Ettinger, president of guernseys.com, which is auctioning it.

“Unlike Mark McGwire’s 70th home run ball, which we sold for $3 million, this ball will never be eclipsed because of what it represents,” Ettinger said.

The value of McGwire’s ball was diminished when his single-season home run record was broken by Barry Bonds and then tarnished by the steroids scandal.

“But I wouldn’t be surprised if it sold for more than $200,000,” Ettinger said.

Money was the last thing on Harshman’s mind when the ball flew off Molina’s bat. Harshman just thought about his father, a lifelong Yankee fan who always wanted to take the family on a pilgrimage to the Stadium, but died of Lou Gehrig’s disease before he had the chance.

“It must have been an ‘Angels in the Outfield’ kind of thing,” he said.

Harshman and his brother decided to fulfill their dad’s lifelong dream and make it to the Stadium for the final game on Sept. 21 and before it was demolished.

An athlete and coach, Harshman said he knew immediately Molina’s ball was going out of the park. It bounced on the net above the seats in left-center field near his brother.

“I actually had a camera strap on my wrist, and somehow had time to slide the camera, step behind my boys and grab it on a bounce through the netting,” he said.

“I was going to pull it through the net, but the security guard told me to give it to him and then he would return it to me.”

That’s when Bronx resident Paul Russo jumped for the ball and, pitching a fit, claimed it was his. The security guard grabbed it back and returned it to Harshman.